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W. & J. COMERPORD.

(No Model.)

DUST COLLECTOR.

Patented Sept. 27,1887.

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5 Sheets-Sheet 2 W; & J. OOMERFORD.

DUST COLLECTOR.

Patented $ept. 27, 1887.

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(No Model.)

5 Sheets-Sheet W. & J. COMERPORD.

I DUST COLLECTOR. vNo. 370,686..

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DUST COLLECTOR. I No. 370,686 Patented Sept. 27, 1887.

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6 UNITED STATES PATENT OFFICE.

WILLIAM OOMERFORD AND JAMES COMERFORD, OF RATHDRUM, COUNTY OF WIOKLOW,IRELAND.

DUST-COLLECTOR.

SPECIFICATION forming part of Letters Patent 180,370,686, datedSeptember 27, 1887.

Application filed July 1'7, 1886. Serial No. 208,256. (No model.)Patented in England January 18, 1886, No. 777; in France J nne 15,1886,No. 176,779; in Germany June 29, 1886, No. 38,486, and inAustria-Hungary October 18, 1886, No. 25,854 and No. 50,404.

To all whom it may concern:

Be it known that we, WILLIAM OoMEREoRn and JAMES COMERFORD, (trading asJames Gomerford & Sons,) at present residing at 5 Rathdrum Mills,Rathdrum, in the county of Wicklow, Ireland, have invented new anduseful Improvements in Dust-Collectors, (which have been patented inEngland January 18, 1886, No. 777 in France. June 15, 1886, No.

IO 17 6,7 7 9; in Germany June 29,1886, No. 38,486;

and in Austria-Hungary October 18, 1886, No. 25,854 and No. 50,404,) ofwhich the following is a full, clear, and exact description.

This invention relates to improvements in I 5 dust-collectors ormachines for filtering air in mills, factories, or other places wherethe air or atmospheric current is charged with stive, dust, or lightparticles, as in mills for treating corn, middlings, bones, gypsum,drugs,

pigments, &c., the object being to collect the particles and preventwaste when such particles are valuable, and merely to intercept themwhen theyare injurious to health.

The invention consists of a dust-collecting machine provided with anair-filter composed of beds or layers of what we term granular material,the material used depending upon the nature of the particles to becaught, but generally being coarser than, though of a na- 0 tureanalagous to, that of the dust, stive, &c., to be intercepted, when suchparticles are to be preserved. Thus, in the case of stive or flour-dust,the small wheat separated from good wheat in the preliminary cleaning,or

. 3 5 crushed wheat or corn or bran might be used but small wheat ispreferred, as the stive or dust is caught by the beard of the wheat andcan be recovered therewith in the process of grinding or in cleaning thesame, as herein- 0 after mentioned. Other grainsuch as riceand smallseeds-such as flaxseed, vetches, cockle, &c.--may be used in the sameway and form efficient filtering media. When the particles arevalueless, any suitable material -as 4 5 sawdust, ground cork, &c.-maybe used. The filtering material selected is bedded between perforated,reticulated, louvered, or otherwise apertured walls or surfaces whichpermit the passage of air, while retaining all or nearly all of thefiltering material.

The inventionalso consists in the construction and arrangement of theparts of the machine, whereby an intermittent circulation of theair-filtering material or medium is maintained through it, so that thefiltering medium is constantly renewed, the material, as it becomesfully charged, being removed for cleaning or other treatment. Thepassage of the air through the filter may be also intermittent, ifdesired, so that the air will not pass through the filtering mediumwhile the latteris in motion, as this might cause the disengagement ofthe dust already caught.

The invention finally consists in the con struction and combination orarrangement of parts, substantially as herein described, and thenpointed out in the claims.

Reference is to be had to theaccompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of one form of machine embodying ourinvention. Fig. 2 is an end elevation of the same. Fig. 3'is averticalcross-section of the same on the line was, 7 5 Fig. 1. Fig. 4 is anelevation of the machine in use, illustrating the production of theaircurre'nt therethrough by exhaust. Fig. 5 is a sectional plan view onthe line 3 3/, Fig. 4.

In carrying out our invention we construct a long and narrow closedchest or chamber, A, the sides of which are formed by double walls (1,preferably of perforated sheet metal or of wire, but which may beapertured in any other suitable manner, as before stated. Be- 85 tweenthe walls a is packed the'granular filtering material, which is suppliedthereto on either side through the space between the double-peaked roofB of the chest. Along the top of the roof, but at one side of the ridgethereof,we provide a box or casing, G, into one end of which leads thechute D, through which the filtering material is supplied. For uniformlydistributing the said material along the roof and between the walls a,wemount an 5 endless screw-conveyer, E, within the casing C, parallel withbut at one side of the ridge of the roof. The supply-conveyerE and itscasing 0 are thus arranged at one side of the ridge of the roof, and theopenings through which the filtering material passes to the oppositespaces between the double roof and walls made unequal,in order tocounteract the effect of the revolution of the screw, which tends tothrow the filtering material laterally in the direction of its rotation,as indicated by the arrow, Fig. 3. The conveyer screw-shaft E projectsthrough the ends of the box or casing.

O, and revolves in suitable bearings therein, and at one end in anadditional bearing, E 011 a bracket, F, secured to one end of the mainframe F of the machine. The conveyershaft Eis revolved from anyconvenient source of power by means of the driving-pally G on one end ofthe same.

In order to remove the filtering material from between the walls a, assuch material becomes charged with the particles of dust, &c., rollersH, which in some cases may be fluted, are mounted beneath and in closeproximity to the openings at the bottoms of the walls, which rollers, asthey revolve, allow the filtering material to slowly descend by gravityinto the hopper-shaped bottom b. The shafts H H of the rollers H aresuitably journaled in the ends of the chest A, and project through oneend of the same.

On the end of the roller-shaft H is fixed a gear-wheel, I, and on theshaft H a sprocketwheel, J, is mounted. The gear-wheel I engages with asimilar gear-wheel, K, rigidly mounted on a short counter-shaft, L, journaled in suitable bearings on the chest A. On the counter-shaft L isalso fixed a sprocket-wheel, M, which is connected with thesprocket-wheel J on the roller-shaft H by an endless chain, N. On theshaft L is fixed a projecting arm, 0, which is adapted to be struck by acrosspiece, 1?, one or more, connecting a pair of endless chains, P,running over a pair of sprocket-wheels, Q, loosely mounted 011 the shaftL, and between which the arm 0 is located. The endless chains P are alsopassed over a pair of sprocket-wheels, R, fixed on the supplyconveyer-shaft E. Vith this construction the counter-shaft L is revolvedonly when the cross-piece I on the endless chains P strikes and carrieswith it the arm 0 on the shaftL through apartial rotation. Thecounter-shaft L, and with it the connected discharge regulating-rollersH, are thus intermittently revolved from the continuously-revolvingconveyer-shaft E. Any other suitable mechanism for intermittentlyrevolving the discharge-rollers H may be employed, if desired.

For removing the discharged filtering material from the bottom b of thechamber, we arrange a trough, 0, along the foot of said hopper-shapedbottom, in which the charged filtering material is received, and in thetrough we mount an endless screw-conveyer, E, by

Figs. 4 and 5.

A, and carries on its end a pulley, S, which is continuously revolvedfrom the supply conveyer-shaft E by a belt, S, and a fixed pulley, T, onthe shaft E.

An air-chute, WV, leads into one end of the chamber A, and conducts thedust-laden air into said chamber. The air is forced therein by thegrinding or other machinery in which the air becomes laden with dust,820., and exhaust-fans may be used in connection therewith forincreasing the draft, as shown in As therein shown, the filter isinclosed in an air-tight casing, U, in which the air is received afterpassing through the filtering medium, as shown by the arrows in Fig. 5.This casing U is connected with the inlet of the exhausefan V, by whichthe filtered air is drawn outward, thus drawing the dust-laden airthrough the filter.

The fans are driven by any convenient power by means of suitableshafting and belts, as shown in Figs. 4 and 5.

In order that the fitering material may be shifted and partiallywithdrawn withoutthe air passing through it while it is in motion, andin order to prevent anyinterruptionin the air-filtering operation, wemay provide duplicate airfiltering or dust-catching machines, thedustladen air being switched from one to the other by means of asuitable air-valve. This valve may be operated from the chains P, sothat while the filtering material is being shifted and removed from theone machine the dustladen air could be admitted into the othermachine,'and conversely.

When the intercepted stive or dust is a valuable product, the filteringmaterial may be removed from the filter and cleaned in a suitablesifting-machine, the air-blast not being employed.

The speed of the discharge-rollers is regulated so that the filteringmedium will not be allowed to become too fully charged with the dustparticles, and thus hinder the passage of the air.

The supply-conveyer E is arranged at one side of the ridge of the roofB, and the spaces for admitting the filtering materials between thewalls a thus made unequal, so that the tendency of the conveyer E tothrow the material in the direction of its rotation, as shown by thearrow, will be equalized.

Having now particularly described and ascertained the nature of the saidinvention and in what manner the same is to be performed, we declarethat what we claim is- 1. In a dust-collector, the combination ofapertured double walls, a traveling bed or layer of granular materialbetween the said walls, and means for supplying fresh material at thetop and withdrawing the foul material at the bottom, substantially asherein shown the chest, a screw-conveyer above the chest,

and described. and mechanism for operating the said rollers 2. A dustcollector comprising a closed and conveyor, all as herein described.chest or chamber, having its side walls made WILLIAM OOMERFORD. 5 doubleand apertured, granular material be- JAMES OOMERFORD.

tween the said double walls, rollers closing Witnesses: the said spaceat bottom and situated within W. SIMPSON, the main chamber, means forimparting in- Bush Mills, Liverpool. termittent motion to the saidrollers, an air- A. WM. LABERTOUOHE,

1o passage communicating with the interior of Notary Public, Dublin.

